appappletinout.java

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import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class AppAppletInOut extends Applet implements ActionListener
{
  public static void main ( String args[] )
  {
    Frame frame = new Frame();
    AppAppletInOut app = new AppAppletInOut();
    app.init();
    frame.add( app );
    frame.setSize( 400,100 );
    frame.show();
  }
  TextField in = new TextField(6);
  Button btn = new Button("确定");
  Label out = new Label("                               ");
  public void init()
  {
    setLayout ( new FlowLayout() );
    add( in );
    add( btn );
    add( out );
    btn.addActionListener( this );
  }
  public void actionPerformed( ActionEvent e)
  {
    String s = in.getText();
    double d = Double.parseDouble( s );
    double q = d * d * d;
    out.setText( d+"的立方是：" + q);
  }
}